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#ifndef SRC_TINT_LANG_WGSL_AST_PARAMETER_H_
#define SRC_TINT_LANG_WGSL_AST_PARAMETER_H_

#include <vector>

#include "src/tint/lang/wgsl/ast/variable.h"

namespace tint::ast {

/// A formal parameter to a function - a name for a typed value to be passed into a function.
/// Example:
///
/// ```
///   fn twice(a: i32) -> i32 {  // "a:i32" is the formal parameter
///     return a + a;
///   }
/// ```
///
/// @see https://www.w3.org/TR/WGSL/#creation-time-consts
class Parameter final : public Castable<Parameter, Variable> {
  public:
    /// Create a 'parameter' creation-time value variable.
    /// @param pid the identifier of the program that owns this node
    /// @param nid the unique node identifier
    /// @param source the variable source
    /// @param name the variable name
    /// @param type the declared variable type
    /// @param attributes the variable attributes
    Parameter(GenerationID pid,
              NodeID nid,
              const Source& source,
              const Identifier* name,
              Type type,
              VectorRef<const Attribute*> attributes);

    /// Destructor
    ~Parameter() override;

    /// @returns "parameter"
    const char* Kind() const override;

    /// Clones this node and all transitive child nodes using the `CloneContext`
    /// `ctx`.
    /// @param ctx the clone context
    /// @return the newly cloned node
    const Parameter* Clone(CloneContext& ctx) const override;
};

}  // namespace tint::ast

#endif  // SRC_TINT_LANG_WGSL_AST_PARAMETER_H_
